Effect of nano Ni–Fe alloy addition on flash pyrolysis of poly(ethylene glycol)
Effect of nano Ni–Fe alloy addition on flash pyrolysis of poly(ethylene glycol)
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DOI：
10.1016/j.jaap.2012.10.014
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发表时间：
2013
影响因子：
6
通讯作者：
Z. Lin;D. Han;S. F. Li
中科院分区：
文献类型：
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作者：
Z. Lin;D. Han;S. F. Li
在氩气气氛下对p-PEG（纯PEG）和PEG/NiFe （PEG与纳米Ni-Fe合金的混合物）进行了闪蒸热解，旨在研究纳米Ni-Fe合金对PEG热解行为和机理的影响。设计了专门的组合系统进行热解实验和热解产物收集，并采用GC/MS对产物进行鉴定。实验结果表明，纳米Ni-Fe合金不仅改变了PEG热解产物的相对含量，而且改变了PEG热解产物的系列。有趣的是，本研究从p-PEG和/或PEG/NiFe热解中检测到所有理论上可能的15个PEG热解产物系列。加入纳米Ni-Fe合金后，6个产品系列消失，2个新产品系列被检测出来。通过对产物端基的定量分析，探讨了纳米Ni-Fe合金对PEG热解过程的影响及其机理。Ni和Fe在PEG热解过程中所起的作用完全不同。Fe通过诱导氢转移和OC键裂解使端基OCH2CH3、OCHCH2、OH和och3向OCH2CHO转移；Ni通过诱导氢化作用使och2转移到och2ch3。
Flash pyrolysis of p-PEG (pure PEG) and PEG/NiFe (mixture of PEG and nano Ni–Fe alloy) was carried out in argon atmosphere, aiming to study the effect of nano Ni–Fe alloy on the behavior and mechanism of PEG pyrolysis. A special combinational system was designed to perform pyrolysis experiment and collect pyrolysis products, while GC/MS was employed to identify the products. The experimental results showed that nano Ni–Fe alloy changed not only the relative contents but also the series of PEG pyrolysis products. It was interesting that all of 15 possible series of PEG pyrolysis products in theory were detected from p-PEG and/or PEG/NiFe pyrolysis in the present work. Six product series disappeared and two new product series were detected after adding nano Ni–Fe alloy. Based on quantitative analysis of the end groups of products, the effect of nano Ni–Fe alloy on PEG pyrolysis process as well as the mechanism was discussed. Ni and Fe played quite different roles in the process of PEG pyrolysis. Fe made end group OCH2CH3, OCHCH2, OH and OCH3transfer to OCH2CHO by inducing hydrogen transfer and OC bond cleavage; Ni made OCHCH2transfer to OCH2CH3by inducing hydrogenation.